41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
#include "resets.h"
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#include "timer.h"
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#include "gpio.h"
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#include "uart.h"
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#include "stdio.h"
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#define LED_PIN (25)
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#define LED_TIME (500 * 1000) /* 500ms */
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int main(void)
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{
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reset_unreset_blocks_wait(RESETS_BLOCK_IO_BANK0 | RESETS_BLOCK_UART0 | RESETS_BLOCK_TIMER);
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gpio_init(0, GPIO_FUNC_UART | GPIO_PULL_UP | GPIO_DRIVE_4MA); /* UART_TX pin */
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gpio_init(1, GPIO_FUNC_UART | GPIO_PULL_UP | GPIO_SCHMITT | GPIO_PAD_IE | GPIO_PAD_OD); /* UART_RX pin */
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uart_init(uart0_hw, 6 * 1000 * 1000, UART_DATABITS_8 | UART_PARITY_NONE | UART_STOPBITS_1);
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printf("gpio_led example\r\n");
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timer_count_write(0);
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gpio_init(LED_PIN, GPIO_FUNC_NULL | GPIO_OVER_OUT_HIGH | GPIO_OVER_OE_ENABLE | GPIO_PULL_UP | GPIO_DRIVE_4MA); /* LED pin */
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while (1) {
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static int flag = 0;
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static uint64_t tick_led = 0;
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uint64_t tick_now;
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tick_now = timer_count_read();
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if (tick_now >= (tick_led + LED_TIME)) {
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if (flag & 1) {
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gpio_set(LED_PIN);
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} else {
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gpio_clear(LED_PIN);
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}
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flag ^= 1;
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tick_led = tick_now;
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printf("tick_led = %llu\r\n", tick_led);
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}
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}
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return 0;
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}
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